Dam per-regulator



(No Model.)

J. B. WEST.

DAMPER REGULATOR.

No. 419,090. Patented Jan. 7,1890. y \6" Fly-'0.

m In 0670 far: w. h J (2:5,:

N PEYERs vhotoulhu m bu, wnhin xm D. C.

UNITED STATES PATENT OFFICE.

JONATHAN B. WEST, OF ROCHESTER, NEWV YORK.

DAM PER-REGULATOR.

SPECIFICATION forming part of Letters Patent No. 419,090, dated January 7, 1890.

Application filed April 24:, 1889. Serial No. 308,464. (No model.)

To all whom it 112 a concern:

Be it known that I, JONATHAN B. WEST, of Rochestenin the county of'Monroe and State of New York, have invented a new and useful Improvement in Devices for Regulating Dampers,which improvement is fully set forth in the following specification and shown in the accompanying drawings.

-My invention relates to devices for automatically operating draft-regulating dampers for'the pipes of stoves and furnaces. Automatic draft-regulators of various kinds have been used, but such, so far as I know, have been made in the form of attachments to the stove orfurnace itself, and so .connected or placed as to be acted upon directly by the heat of the furnace or stove, or else such regulating devices have involved electric batteries and clock-work, all of which are expensive and complicated.

The object of my invention is to produce a regulating device for the furnace or stove damper located in the apartment to be warmed by the furnace and caused to act by the changing of temperature of the apartment itself without regard directly to the heat of the distant furnace.

The invention is hereinafter more fully described, and particularly pointed out in the claims.

This device consists, essentially, of a long strip of metal so connected withabar of wood or other substance not caused to change from the action of the heat that a swinging motion will result from the expansion and contraction of the metal strip, and employ this motion to operate an easy'moving damper of some kind to regulate the draft of the stove or furnace. This metal strip and bar are inclosed in a case perforated to admit air of the apartment to the metal strip. This device may be arranged to lie horizontally upon supports in any convenient part of the room; but I preferto arrange it to stand vertically, as herewith shown.

Referring to the drawings, Figure 1 shows the device as standing snugly in one corner of the room, parts being vertically sectioned; and Fig. 2 shows the same seen as indicated by arrow in Fig. 1. Fig. 3,drawn to a larger scale, is a View of the device condensed as to length, parts being broken away and longitudinally sectioned as 011 the broken dotted line 3 3 in Fig. 5, the view being opposite to that shown in Fig. 1; Fig. 4, a view seen as indicated by arrow a in Fig. 3, parts being broken away and the figure condensed as to length; Fig. 5, a top view indicated by arrow y in Fig. 3, a part being broken away; and Fig. 6, a View showing a smoke -pipe and damper.

Referring to the parts, A is a prismatic case holding the operating parts of the device, this case being composed of a perforated ornamental side a and two imperforate sides I) Z), the fourth side being preferably a sheet of wire-cloth c. This case is designed to stand in any 0ut-0fthe-way place in the apartment the temperature of which is to be regulatedas, forinstance,in the corner of the room next to the wall 13, with its lower end resting upon the floor O. In practice this case is three or four inches square in cross-section and about six feet long, all the dimensions of which may, however, be changed to suit circumstances. The case has a cap-piece or head (1 covering its upper end, formed with a circular hole 6.

f is a circular suspending-plate forming a part of the head for the case, serving to hold the operating parts, having a part fitting within the opening P, so as to be turned in a horizontal plane.

g is an eXpansion-stri p, preferably of metal, as zinc, copper, or other material that expands and contracts rapidly with the changes of temperature. To the upper end of this strip is secured a screw 7L, extending upward through the center of the plate fand provided with an adj usting-nut 1';

75 is a stiff bar of well-seasoned wood or other material that is the least aifected by changes in temperature. This bar and the strip are about the same length, the two extending nearly the whole length of the case A, being placed even at their lower ends and rigidly held together thereat by fasteningscrews Z. The bar and expansion-strip stand somewhat apart attheir upper ends, as shown in Fig. 4.

n is a grooved metal head secured to the upper end of thebar, reaching nearly to the under surface of the cap-piece d.

0 0 are two pointed bearing-screws entering the groove in the head, these screws extendtwo opp'ositewalls-of the case; but it is fre this motion of the bar and strip that I utilize to operate a draft-damperas, for instance, one placed in the smoke pipe or fine of the stove or furnace.

Fig. 6 shows a common smoke pipe or chimney D, formed with a branch F. "Within the.

branch is a common circular damper p, fitted to? turn on a horizontal axis 0", and provided with a radial arm s, by which to operatevitw A weighted arm 10, connected with thedamper; tendsto close it. The expansion-strip g (on the bar k, either one, as may be most-com venientllhasan extended part Or-stem-t, reachingdownward through a hole to in the flo orto be connected with the damper. The

stem 25 is connected with the arm .9 of the" daliiperby a thread 0, as indicated in Figs.4 an-d 6, so that when the expansion strip moves from a fall in temperature a correspondingem'otion of the damper will resu-lt.- For instanceywhenthe stem 25 stands to the left, as shown 'in'Fig.-.6, the damper will he held open byJt-he weight to, and allow the I draft of-thechimney to'be supplied through the-branch The fire in the fu-rnace' is thus" allowed Y to run down. strip,"now-contracting from the cooling of the room, pulls the stem't to the--position shown in dotted lines and closes the damper This al-- against-the action of the weight w. lows a draft through the furnace, causing the .;fire toincrease.

If the thermostat and damper are so situated in-any case that it is not convenient to run the thread directly fro m one to the other, ordinary pulleys and bell-cranks areemployed to make the necessary bends and-turns.

As thevdevice is shown in most of the figures, the stemt moves directly toward or from quentlyconvenient to have these motions in someeother direction. To effect this, 'it is onlyjnecessary toturn the plate f to any position in the head desired, as indicated in Fig. 5. For instance, as shown in full lines, themotions of the stem will be in the vertical-plane a a. If the plate be turned through one-fourth of a revolution,bringing the mark 12' to c, the motions of the stem will be in the The ex'pansionplane (1 d. If the plate be turned so the mark I) shall stand at e, the motions of the stem will be in the plane f f. The plate may be thus set to cause the stem to move in any vertical plane. hen the plate is properly brought to place in any given case, it is made fast to the part d by simple fasteningscrews g. The parts may be adjusted so as to cause the stem t to move in a plane crossing the axis of the case by slightly turning one of the screws 0 and the nut i in one direction or the other, as may be required in any given case: The nutt' is drawn up so that the head ofthe bar will always bear against the screws 0 even when the strip 9 is most expanded by the heat of the surroundin g air.

Whatl clailnasmyinvent-ion isl. A devicefor moving-the damper of a stove or furnace, consisting of a case, in combinationwith a bar-:andan eX-pansion strip sub' stantially parallel with the :bar within the case, said bar and striptbeingrigidly joined atone end-of each andseparatedattheiropposite ends, an adjusting-screwsecuredto the free end of the" expansion---strip,ybearingscrews for the free end of thekbarganda head for the case holding said adj usting-screw'and the bearingscrews, substantially as described.

2. In a device for moving-the damper of 'a stove or furnace, a case-or -holde'r,-in combi- I nation with -a bar, and -anexpansion-strip a holding-screw for the strip piercing the'axis of said plate,andbeariugscrews for thewbar piercing said plate at one side the :axis and" fasteners forsaid plate, substantially ass-hown and described.

3. In combination with a damper for a stove, an expansionstrip, a rigid barwjoined: to the expansion-strip, a case for holding the bar and strip, a head for the case,bearing-screws for the bar piercing the head, an adjustingscrew for the strip. piercing the head; and a connecting thread or cord for said expansionstrip and'damper, substantially as and for the purpose set forth.

.Inwitness-whereof I have hereunto set my hand, this l9th dayof= April, 1889, in the pres 

